Winding machines are divided into pre stretching winding machines and resistance stretching winding machines according to different winding and stretching modes of film frame.
The pre stretching winding machine is a model widely used in the market at present. The pre stretching winding machine pulls the winding film according to the tension set by the winding machine through the motor on the pre stretching film frame, and then wraps it on the pallet goods placed on the turntable of the winding machine. The winding film stretched by the pre stretching winding machine is uniform and beautiful.
The resistance tension winding machine makes the winding film passively pull out of the film frame through friction resistance. The pulling speed should be slower than the rotation speed of the goods. At the same time, the resistance of the resistance tension winding machine is zero. Therefore, the goods with too light pallet goods are not suitable for resistance tension winding machine, which is easy to pull the goods obliquely or bulk goods.
Advantages and disadvantages: the resistance of the resistance tension winding machine is zero, so the requirements for the winding film are not high. However, compared with the pre tension winding machine, the resistance tension winding machine wastes the winding film and increases the use cost. And the goods packaged by the anti stretch winding machine are not stable and beautiful as the Pre Stretch winding machine.
The main difference between the resistance stretch type and the Pre Stretch type of winding machine is that under the same conditions, the number of stretch films is different. The Pre Stretch type can generally save the cost of winding film than the resistance stretch type.
It is found that the pre stretching type is a very economical and practical tray winding machine. It can save a lot of costs for enterprises.